Explicit casting and shared dlls

[serializer]

I have a dll which has some base classes - for example a class called Market.

This dll is used in a web service and a winform project. In the webservice I have a function returning and object of type Market.

The problem I am having is that I can't cast the returned object to the dll class. I have tried (Market) and as conversion but get errors at compile level.

Even though the classes are "the same" I assume that the namespace is the problem. An example of this is that the winforms application thinks that the webservice function returns type:

Winformsapplication.Servicereference.Market

While the dll that both uses are:

MyDll.Market

How can I convert these objects?

 

[jmeckley]

they are not the same. it like meeting two people with the same name, they are not the same person. You have 2 options.
1. use an adapter

class MarketAdapter : Winformsapplication.Servicereference.Market
{
   private readonly MyDll.Market market;
   public MarketAdapter(MyDll.Market market)
   {
       this.market = market;
   }

   public Id 
   { 
      get { return market.Id;} 
      set {market.Id = value;} 
   }

   //repeat for all properties
}

2. map one to the other

class MarketMapper
{
   public Winformsapplication.Servicereference.Market map_from(Dll.Market market)
   {
         return new Winformsapplication.Servicereference.Market
             {
                Id = market.Id,
                //repeate for other properties
             };
   }
}

Jason Meckley
Programmer
Specialty Bakers, Inc.

 

[MadJock]

Hi Serializer,

Another approach I often take is to return a string rather than an object from my WebService. This string is a serialized Market (i.e. xml representation).

I then deserialize this string on the client side to type Market. This then gives you the same type on both client and server, given that the class is defined in a DLL used on both client and server, this will work fine.

Let me know if you need a more details example.

Thanks,

madJock

"Just beacuse you're paranoid, don't mean they're not after you